"Learning that three of our members, two of whom were white, had disappeared really blew away all my ideas that possibly we would have protection from the fact that the majority of the summer volunteers were white. I knew now that that was not the case: that everybody was in grave danger, and that these Mississippians would kill all of us, white and black." Watch "Freedom Summer" premiering June 24, 2014 on PBS.
Follow seven former Amish who choose their freedom over their family
The grave truth behind modern forensics was discovered in 1920s New York.
In the decade after the Civil War, former slaves sing their way into a nation's heart with spirituals, the religious anthems of slavery.
Murderer, martyr, hero - John Brown's violent crusade against slavery would divide the nation and spark the Civil War.
The story of the Mexican American miners whose labor battles shaped the course of Arizona history.
In 1967, thousands of hippies flocked to San Francisco's Haight Ashbury district.
The American effort to relieve starvation in Soviet Russia in 1921 during the worst natural disaster in Europe in 500 years.
Explore how Orson Welles' genius use of the new medium of radio struck fear into an already anxious nation.